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Inspection Procedure

  1. IDENTIFY COMPONENT SHOWN BY SUB-CODE 
    1. Enter the diagnostic mode.
    2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
    3. Identify the component shown by the sub-code.

      HINT:

      • "110 (multi-display)" is the component shown by the sub-code in the example shown in the illustration.
      • The sub-code will be indicated by its physical address.
      • For the component list, refer to Diagnosis Display Detailed Description in the System Description (See SYSTEM DESCRIPTION  ).
        Fig 1: Identifying "LAN Monitor"Display Screen
        G04948950Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE 
    1. Inspect the power source circuit of the component shown by the sub-code.

      Component Table 

      COMPONENT CHART

      Display Proceed to
      Radio receiver (190) Radio receiver power source circuit (See RADIO RECEIVER POWER SOURCE CIRCUIT  )
      Stereo component amplifier (440) Stereo component amplifier power source circuit (See STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT  )
      Television display (1 F6)(1) Television display power source circuit (See TELEVISION DISPLAY POWER SOURCE CIRCUIT  )
      Parking assist ECU (1AC)(2) Parking assist ECU power source circuit (See ECU POWER SOURCE CIRCUIT )
      Stereo component tuner (1F1)(3) Satellite radio tuner power source circuit (See SATELLITE RADIO TUNER POWER SOURCE CIRCUIT  )
      (1) w/ Rear Seat Entertainment System
      (2) w/ Wide View Front and Side Monitor System
      (3) w/ SDARS System

      If the power source circuit is operating normally, proceed to the next step.

  3. INSPECT RADIO RECEIVER ASSEMBLY 
    Fig 2: Identifying F1 And F23 Receiver Connectors Terminals
    G05630182Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F1 and F23 receiver connectors.
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE

      Tester Connection Condition Specified Condition
      F1-5 (ATX+) - F1-15 (ATX-) Always 60 to 80 Ω
      F23-9 (TX+) - F23-10 (TX-)

    NG: REPLACE RADIO RECEIVER ASSEMBLY  (See REMOVAL  )

    OK: Go to next Step 

  4. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMPONENT SHOWN BY SUBCODE) 

    HINT:

    • Start the check from the circuit that is near the component shown by the sub-code first.
    • For details of the connectors, refer to TERMINALS OF ECU  (See ).
    1. Referring to the AVC-LAN wiring diagram, check the AVC-LAN circuit between the multi-display and the component shown by the sub-code.
      1. Disconnect all connectors between the multi-display and the component shown by the sub-code.
      2. Check for an open or short in the AVC-LAN circuit between the multi-display and the component shown by the sub-code.

        OK: There is no open or short circuit. 

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next Step 

  5. REPLACE COMPONENT SHOWN BY SUB-CODE WITH NORMAL ONE AND CHECK 
    1. Replace the component shown by the sub-code with a normal one and check if the same problem occurs again.

      OK: Same problem does not occur. 

    NG: REPLACE MULTI-DISPLAY ASSEMBLY  (See REMOVAL  )

    OK: END 

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